Polarized electromagnetic relay
US4713638A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Oct 24, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H51/2227
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bistable type of electromagnetic relay has a movable block including a pair of permanent magnet units. Each of the magnet units has a permanent magnet and a pair of generally U-shaped magnetic plates attached to its opposite poles. A rotation of the movable body actuates relay contact members. A yoke has opposite ends, each formed by a pair of opposing end pieces, the end of the magnetic plates being arranged in spaces defined by the opposing end pieces. A coil supporting a spool has a through-hole for receiving a core which is inserted therein. Flanges are formed at opposite ends and at a center portion of the spool, with a plurality of protrusions protruding outwardly on both sides of each flange. A pair of base members have grooves and recesses for receiving the protrusions on the flanges of the spool, for rotatably supporting the movable block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.